我想在我的应用上添加分享按钮。
如果用户使用该应用，则可以选择他们可以共享我的应用，但不幸的是，它没有发生。
这是我的代码：
MainActivity.java
package com.vvhvb.hesselfeenstra.vvheerenveenseboys;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.view.MenuItemCompat;
import android.support.v7.app.AppCompatActivity;
import android.widget.ShareActionProvider;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.webkit.WebView;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
String url ="http://dehvb.nl/";
WebView view=(WebView) this.findViewById(R.id.webView);
view.getSettings().setJavaScriptEnabled(true);
view.getSettings().setBuiltInZoomControls(true);
view.getSettings().setDisplayZoomControls(false);
view.loadUrl(url);
}
private ShareActionProvider mShareActionProvider;
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
MenuItem item = menu.findItem(R.id.menu_item_share);
mShareActionProvider = (ShareActionProvider)MenuItemCompat.getActionProvider(item);
Intent sharingIntent = new Intent(android.content.Intent.ACTION_SEND);
sharingIntent.setType("text/plain");
String shareBody = "here goes your share content body";
sharingIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "Share Subject");
sharingIntent.putExtra(android.content.Intent.EXTRA_TEXT, shareBody);
//then set the sharingIntent
mShareActionProvider.setShareIntent(sharingIntent);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.menu_item_share) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
menu_main.xml
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
tools:context="com.vvhvb.hesselfeenstra.vvheerenveenseboys.MainActivity">
<item
android:id="@+id/menu_item_share"
app:showAsAction="ifRoom"
android:title="Share"
android:icon="@drawable/share"
android:actionProviderClass="android.support.v7.widget.ShareActionProvider" />
</menu>
logcat的：
06-10 14:37:09.841 24733-24733/com.vvhvb.hesselfeenstra.vvheerenveenseboys I/Timeline: Timeline: Activity_idle id: android.os.BinderProxy@ed7b38d time:33915488
06-10 14:37:15.501 28065-28065/com.vvhvb.hesselfeenstra.vvheerenveenseboys I/cr_Ime: ImeThread is not enabled.
06-10 14:37:15.511 28065-28065/com.vvhvb.hesselfeenstra.vvheerenveenseboys D/Activity: performCreate Call Injection manager
06-10 14:37:15.511 28065-28065/com.vvhvb.hesselfeenstra.vvheerenveenseboys I/InjectionManager: dispatchOnViewCreated > Target : com.vvhvb.hesselfeenstra.vvheerenveenseboys.MainActivity isFragment :false
06-10 14:37:15.521 28065-28195/com.vvhvb.hesselfeenstra.vvheerenveenseboys D/OpenGLRenderer: Use EGL_SWAP_BEHAVIOR_PRESERVED: true
06-10 14:37:15.531 28065-28196/com.vvhvb.hesselfeenstra.vvheerenveenseboys E/libEGL: validate_display:255 error 3008 (EGL_BAD_DISPLAY)
06-10 14:37:15.531 28065-28196/com.vvhvb.hesselfeenstra.vvheerenveenseboys D/libEGL: eglInitialize EGLDisplay = 0xdccbf864
06-10 14:37:15.541 28065-28065/com.vvhvb.hesselfeenstra.vvheerenveenseboys D/PhoneWindow: *FMB* isFloatingMenuEnabled mFloatingMenuBtn : null
06-10 14:37:15.541 28065-28065/com.vvhvb.hesselfeenstra.vvheerenveenseboys D/PhoneWindow: *FMB* isFloatingMenuEnabled return false
06-10 14:37:15.591 28065-28195/com.vvhvb.hesselfeenstra.vvheerenveenseboys D/libEGL: eglInitialize EGLDisplay = 0xdd13fc54
06-10 14:37:15.591 28065-28195/com.vvhvb.hesselfeenstra.vvheerenveenseboys I/OpenGLRenderer: Initialized EGL, version 1.4
06-10 14:37:15.591 28065-28195/com.vvhvb.hesselfeenstra.vvheerenveenseboys I/OpenGLRenderer: HWUI protection enabled for context , &this =0xeedbea00 ,&mEglDisplay = 1 , &mEglConfig = -189468004
06-10 14:37:15.591 28065-28195/com.vvhvb.hesselfeenstra.vvheerenveenseboys D/OpenGLRenderer: Get maximum texture size. GL_MAX_TEXTURE_SIZE is 8192
06-10 14:37:15.591 28065-28195/com.vvhvb.hesselfeenstra.vvheerenveenseboys D/OpenGLRenderer: Enabling debug mode 0
06-10 14:37:15.591 28065-28195/com.vvhvb.hesselfeenstra.vvheerenveenseboys D/mali_winsys: new_window_surface returns 0x3000, [1080x1920]-format:1
06-10 14:37:15.791 28065-28065/com.vvhvb.hesselfeenstra.vvheerenveenseboys I/InjectionManager: dispatchCreateOptionsMenu :com.vvhvb.hesselfeenstra.vvheerenveenseboys.MainActivity
06-10 14:37:15.791 28065-28065/com.vvhvb.hesselfeenstra.vvheerenveenseboys I/InjectionManager: dispatchPrepareOptionsMenu :com.vvhvb.hesselfeenstra.vvheerenveenseboys.MainActivity
06-10 14:37:15.901 28065-28065/com.vvhvb.hesselfeenstra.vvheerenveenseboys I/Timeline: Timeline: Activity_idle id: android.os.BinderProxy@ed7b38d time:33921540
06-10 14:37:16.601 28065-28065/com.vvhvb.hesselfeenstra.vvheerenveenseboys W/cr_BindingManager: Cannot call determinedVisibility() - never saw a connection for the pid: 28065
06-10 14:37:16.601 28065-28065/com.vvhvb.hesselfeenstra.vvheerenveenseboys D/cr_Ime: [InputMethodManagerWrapper.java:59] isActive: true
06-10 14:37:16.601 28065-28065/com.vvhvb.hesselfeenstra.vvheerenveenseboys D/cr_Ime: [InputMethodManagerWrapper.java:68] hideSoftInputFromWindow
06-10 14:37:21.811 28065-28065/com.vvhvb.hesselfeenstra.vvheerenveenseboys D/ViewRootImpl: ViewPostImeInputStage ACTION_DOWN
06-10 14:37:21.881 28065-28065/com.vvhvb.hesselfeenstra.vvheerenveenseboys I/InjectionManager: dispatchOptionsItemSelected :com.vvhvb.hesselfeenstra.vvheerenveenseboys.MainActivity
06-10 14:37:22.261 28065-28065/com.vvhvb.hesselfeenstra.vvheerenveenseboys D/ViewRootImpl: ViewPostImeInputStage ACTION_DOWN
06-10 14:37:22.361 28065-28065/com.vvhvb.hesselfeenstra.vvheerenveenseboys I/InjectionManager: dispatchOptionsItemSelected :com.vvhvb.hesselfeenstra.vvheerenveenseboys.MainActivity
06-10 14:40:49.801 31316-31316/com.vvhvb.hesselfeenstra.vvheerenveenseboys D/AndroidRuntime: Shutting down VM
06-10 14:40:49.801 31316-31316/com.vvhvb.hesselfeenstra.vvheerenveenseboys E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.vvhvb.hesselfeenstra.vvheerenveenseboys, PID: 31316
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.widget.ShareActionProvider.setShareIntent(android.content.Intent)' on a null object reference
at com.vvhvb.hesselfeenstra.vvheerenveenseboys.MainActivity.onCreateOptionsMenu(MainActivity.java:48)
at android.app.Activity.onCreatePanelMenu(Activity.java:3124)
at android.support.v4.app.FragmentActivity.onCreatePanelMenu(FragmentActivity.java:340)
at android.support.v7.view.WindowCallbackWrapper.onCreatePanelMenu(WindowCallbackWrapper.java:85)
at android.support.v7.app.AppCompatDelegateImplBase$AppCompatWindowCallbackBase.onCreatePanelMenu(AppCompatDelegateImplBase.java:258)
at android.support.v7.view.WindowCallbackWrapper.onCreatePanelMenu(WindowCallbackWrapper.java:85)
at android.support.v7.app.ToolbarActionBar.populateOptionsMenu(ToolbarActionBar.java:454)
at android.support.v7.app.ToolbarActionBar$1.run(ToolbarActionBar.java:61)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:6917)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199)
06-10 14:40:54.201 31316-31316/com.vvhvb.hesselfeenstra.vvheerenveenseboys I/Process: Sending signal. PID: 31316 SIG: 9
答案 0 :(得分：6)
首先，修改menu.xml文件以包含share-action菜单项：
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
tools:context="com.vvhvb.hesselfeenstra.vvheerenveenseboys.MainActivity">
<item
android:id="@+id/action_settings"
android:orderInCategory="100"
android:title="@string/action_share"
android:icon="@drawable/share"
app:showAsAction="ifRoom" />
<-- here is the share action menu item -->
<item
android:id="@+id/menu_item_share"
app:showAsAction="ifRoom"
android:title="Share"
app:actionProviderClass=
"android.support.v7.widget.ShareActionProvider" />
</menu>
然后根据共享操作菜单项添加onCreateOptionsMenu代码来更改ShareActionProvider：
//add the following imports (you may already have them)
import android.support.v4.view.MenuItemCompat;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.ShareActionProvider;
...
private ShareActionProvider mShareActionProvider;
...
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
MenuItem item = menu.findItem(R.id.menu_item_share);
mShareActionProvider = (ShareActionProvider)MenuItemCompat.getActionProvider(item);
//create the sharing intent
Intent sharingIntent = new Intent(android.content.Intent.ACTION_SEND);
sharingIntent.setType("text/plain");
String shareBody = "here goes your share content body";
sharingIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "Share Subject");
sharingIntent.putExtra(android.content.Intent.EXTRA_TEXT, shareBody);
//then set the sharingIntent
mShareActionProvider.setShareIntent(sharingIntent);
return true;
}
我希望这会对你有所帮助。请试试看，让我知道。您还可以查阅这些密切相关的链接：